Ordinary injury, big surprise - Traumatic false aneurysm and arteriovenous fistula of the posterior tibial artery after civilian trauma: A case report.

INTRODUCTION: False traumatic aneurysm (FTA) or pseudoaneurysm and traumatic arteriovenous fistulas (TAVF) are rare pathologies in civilian trauma and mainly result from stabs or gunshot wounds. The posterior tibial artery as site of trauma is very rare. PRESENTATION OF CASE: We report on a 39-year old female patient who was suffering from combined FTA and TAVF of the posterior tibial artery after falling into a wine glass. CT-imaging as well as duplex ultrasound and selective arteriography were performed, and two stent-grafts were inserted. DISCUSSION: Based on the presented case, incidence of the described pathology, treatment options and outcomes are discussed. CONCLUSION: Adequate imaging in penetrating wounds to the extremities is crucial in order to provide diagnosis and treatment of concomitant lesions.

Animal experiments for the determination of an optimal wavelength for retinal coagulations.

The retina of rabbits was coagulated with different wave-lengths (570-630 nm) using a tunable dye laser with Rhodamin 6G. To achieve comparable ophthalmoscopic appearance the intensity of the laser beam was varied with neutral filters of varying absorption. Histologic examination of fresh coagulation effects and 3-week-old coagulation scars showed no difference in relation to the wave-length used. Theoretically, 577 nm seems to be a particularly useful wavelength for the treatment of a wide variety of retinal lesions because it is not absorbed in xanthophyll and penetrates opacities of the optic media better than argon blue green. Furthermore, it is absorbed maximally in hemoglobin, making it particularly suitable for the coagulation of blood vessels.

Automatic phase-matched frequency-doubling system for the 240-350-nm region.

An automatic frequency-doubling system has been constructed using a lithium formate monohydrate crystal as the frequency doubler in a stationary optical arrangement. Without any readjustment of the crystal orientation, smooth tuning of the uv light over the 240-350-nm range has been obtained. The feasibility of this system for uv absorption measurements has been successfully demonstrated using S0(2) gas.